Resilient wheel



B. JENDRYKE.

RESILIENT WHEEL.

APPLICATION FILED JAN.29. 1918.

1,354,304. Patented Sept. 28, 1920.

llvll IN V E IV 70/? Berg/am 112 Jim dry/r0 A TTOR/VEY UNITED STATES BENJAMIN JENDRYKE, OF SAN FRANCISCO, CALIFORNIA.

RESILIENT WHEEL.

Specification of Letters Patent.

Patented Sept. '48, 1920.

Application filed January 29, 1918. Serial No. 214,273.

T 0 all whom it may concern:

Be it known that I, BENJAMIN J ENDRYKE, a citizen of Poland, resident of San F rancisco, county of San Francisco, and State of California, have invented certain new and useful Improvements in Resilient Wheels, of which the following is a specification.

This invention relates to improvements in resilient wheels, and has as its special object the provision of a wheel having a resilient tire, simulative of the ordinary pneumatic type, in which the inner tube is formed by a strip having overlapping edges, and in which a helically Wound spring is located each coil or convolution of which is offset relative to the adjacent coil or convolution, while all the convolutions are connected together by loop elements forming a spring making contact with the inner wall of the casing at opposed points.

A further object is to provide means whereby punctures and the like will in no wise effect the resiliency and operative qualities of the wheel.

These and other like objects are attained by the novel construction and combination of parts hereinafter described and shown in the accompanying drawings, forming a material part of this specification, and in which Figure l is a side view of a wheel according to the present invention, partly in section- Fig. 2 is a fragmentary plan view of the tube.

Fig. 8 is a transverse sectional view taken on line 33 of Fig. 2, and

Fig. 4L is a transverse sectional view through the tire in its assembled form.

Throughout the several views the numeral 10 designates the outer casing, carcass or tread, which is formed with adjacent annular projections 11, fitted to engage with the rim of the wheel, the same representing a conventional type of construction.

As shown in the drawing a tube 20 is formed by overlapping the contiguous edges 21 and 22, of a strip, the edge 21 having eyes or loops 23 secured to it, while the opposite edge 22, has similar eyes or loops 24 secured at spaced intervals adjacent to the marginal edge, the loops upon one edge being ofiset with relation to the loops upon the other edge, and through all of the several loops is threaded a lacing cord 25, so

that the adjacent edges may be overlapped and drawn together to any desired extent.

Within the tubular casing formed by the strip is a helically wound spring, each coil or convolution of which is offset relative to the adjacent coil or convolution, one of the convolutions 28, being offset, with relation to the convolution 30, all of which are connected together by loop elements 31 form- 111g in efl'ect a spring, which makes contact with the interior of the casing, at opposed points. In making this spring, the wire is wound cylindrically, forming a spiral of ordinary construction, after which each alternate convolution is offset with respect to the others, thereby giving an additional degree of resiliency to the tire. The alternating coils produce a better resiliency within the casing than does the coils of a plainly wound spiral spring and it is also pointed out that the elasticity or resiliency of each alternate coil is controlled by the lacing cord 25, by means of which the diameter of the tube may be regulated to fit the outer tread or casing 10.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1. In a resilient wheel of the character described, the combination of a casing with a strip forming an inner tube, contiguous edges on said strip, of means for adjustably connecting said contiguous edges of the strip forming said tube, a coil spring within said inner tube having each of its convolutions offset from the next following one, said spring contacting with the interior wall of the tube at opposed points.

2. In a resilient wheel of the character described, the combination of a casing with an inner tube, a strip forming said inner tube, loops secured to the oppositely disposed contiguous edges of said strip and a lacing cord threaded through all of said loops, a spring within said tube composed of a plurality o1: convolutions pressed in opposite directions to closely fit against the inner wall of said tube, said lacing cord controlling the resiliency of each of said convolutions, substantially as described and for the purpose set forth.

In testimony whereof I have aflixed my signature.

BENJAMIN JENDRYKE. 

